CN201256115Y

CN201256115Y - Vacuum additron

Info

Publication number: CN201256115Y
Application number: CNU2008201228443U
Authority: CN
Inventors: 任建昌
Original assignee: Beijing Orient Vacuum Electric Co Ltd
Current assignee: Beijing Orient Vacuum Electric Co Ltd
Priority date: 2008-09-28
Filing date: 2008-09-28
Publication date: 2009-06-10
Anticipated expiration: 2018-09-28

Abstract

The utility model discloses a vacuum switch tube, which comprises a first conducting rod and a second conducting rod, wherein one end of the first conducting rod is equipped with a first contact, one end of the second conducting rod is equipped with a second contact, the first contact and the second contact are similar spheres of which lateral surfaces are convex arc-shaped, the outer portions of the first contact and the second contact are respectively equipped with a casing, the inner portion of the casing is equipped with a conducting bottom layer, a magnetic conducting component is arranged on the conducting bottom layer, an arc-proof layer is arranged on the magnetic conducting component, further, both the magnetic conducting components are equipped with through concave gaps from one lateral edge to inside and from top to bottom, conducting components are inserted in the concave gaps, the arc-proof layers of the first contact and the second contact are arranged oppositely, and the first contact and the second contact are sealed by a vacuum tube body. The vacuum switch contacts in the vacuum switch tube are high in magnetic field strength, fine in heat-conducting property, and have high capacity of breaking current and relatively long electric service life. As longitudinal magnetic fields of the contacts are distributed uniformly on the surfaces of the contacts, thereby the vacuum switch tube is more suitable for high capacity switches, and has higher breaking capacity.

Description

Vacuum switch tube

Technical field

The utility model relates to a kind of vacuum switch tube, and especially a kind of contact surface can produce multipole longitudinal magnetic field, be more suitable for cut-offfing the vacuum switch tube of high current capacity.

Background technology

Switchgear is the equipment that must use in the circuit, and it plays a part to close closes, cut-offs circuit.In the interrupting process of switch contact, need to carry out arc extinguishing, the temperature of switch is raise and the loss switch so that contact can resolutely separate and prevent electric arc.Because vacuum switch has less clearance, higher proof voltage ability, lower arc voltage, higher breaking current ability, lower electrical wear and higher electric life, therefore is widely used in the power circuit.

The core component of vacuum switch tube is the vacuum interrupter in the housing.The performance of vacuum interrupter inside contact directly determines the performance of vacuum switch tube.The contacts of vacuum switch rear portion of vacuum switch tube connects moving conductive rod and static conductive rod respectively, and the action that contact disconnects is to divide open contact by controlling moving conductive rod machinery.During disconnection, the contact area of contact is more and more littler, up to contact a contact point is only arranged, contact resistance increases simultaneously, the temperature in zone is increasing, and up to contact point fusing, evaporation and ionization, metallic vapour makes the discharge in the vacuum be maintained, produce vacuum arc, finish the electric disconnection of contact at last.

The defective that prior art exists is: no matter be horizontal magnetic or vertical magnetic, its magnetic field intensity is lower; During each component-assembled, need under vacuum high-temperature, use silver-copper brazing alloy to carry out soldering, just can link together; Because the restriction of planform, vacuum switch tube is difficult to form good longitudinal magnetic field and carries out extinguishing arc, and poor thermal conductivity and breaking capacity are poor.

The utility model content

The purpose of this utility model is the defective at prior art, a kind of vacuum switch tube is provided, integral body is integrated direct package assembly, does not need to carry out soldering and connects, and changes the structure that each isolation of components is provided with in the prior art, and magnetic field intensity is big, good heat conductivity has high breaking current capacity and long electric life, and the longitudinal magnetic field of contact being evenly distributed in contact surface, be more suitable for having bigger breaking capacity in big capacity switch.

For achieving the above object, the utility model provides a kind of vacuum switch tube, comprise first conducting rod and second conducting rod, described first conducting rod, one end is provided with first contact, described second conducting rod, one end is provided with second contact, described first contact and second contact are that the side is the globoid of convex, the outside of described first contact and second contact is laid a housing respectively, described enclosure interior is laid conductive substrate, lay magnetic conductive part on the described conductive substrate, lay are-tight layer on the described magnetic conductive part, described magnetic conductive part from a side to inside, offer the perforation notch from top to bottom, plug conductive component in the described notch, the are-tight layer of described first contact and second contact is oppositely arranged, the conductive component of the magnetic conductive part of described first contact and described second contact is oppositely arranged, and described two contacts of vacuum switch are sealed by a vacuum body.

First contact in the utility model vacuum switch tube and second contact are whole directly package assembly, and its magnetic field intensity is big, and good heat conductivity has high breaking current capacity and long electric life.The longitudinal magnetic field of contact is evenly distributed contact surface, is more suitable for can reaching disjunction more than 40.5 kilovolts in big capacity switch, as the ability of voltages such as 55 kilovolts, 72.5 kilovolts and 110 kilovolts.

Below by drawings and Examples, the technical solution of the utility model is described in further detail.

Description of drawings

Current diagram when Fig. 1 works for the utility model vacuum switch tube embodiment;

Fig. 2 is the sectional view of first contact among the utility model vacuum switch tube embodiment.

Embodiment

Main theme of the present utility model is each parts of contact that original separation is provided with, and is placed in the container of an outer package, makes contact have integrated overall structure.More specifically conductive component and magnetic conductive part are cooperatively interacted and be arranged at the bottom of container, are-tight layer is arranged on conductive component and forms on the end face of back formation with magnetic conductive part; Magnetic conductive part has the notch that magnetic circuit disconnects, and the configuration form that conductive component and magnetic conductive part cooperatively interact can make the surface of contact produce longitudinal magnetic field.Can be cup as the cooperatively interact container of outer package of are-tight layer, conductive component and magnetic conductive part.The side of this contact is a convex, therefore can increase magnetic field around the path, increase the intensity of longitudinal magnetic field.

Current diagram when Fig. 1 works for the utility model vacuum switch tube embodiment.As shown in Figure 1, first contact 10 is the globoid of convex for the side, and in the present embodiment, first contact 10 and second contact 20 all can be made as the spheroid of clipping the two ends spherical crown.With first contact 10 is example, the outside of this first contact 10 is laid with a housing 1, the housing 1 inner conductive substrate 2 of laying, lay magnetic conductive part 5 on the conductive substrate 2, lay are-tight layer 6 on the magnetic conductive part 5, magnetic conductive part 5 from a side to inner, offer and connect notch 3 from top to bottom, plug conductive component 4 in the notch 3.

Fig. 2 is the sectional view of first contact among the utility model vacuum switch tube embodiment.As shown in Figure 2, in this first contact 10, conductive component 4 and magnetic conductive part 5 cooperatively interact, and have formed notch 3 in the middle of it.The shape of this notch can be circle.Similarly, this notch can also be shapes such as ellipse, triangle, square or rectangle.

Again as shown in Figure 1, this vacuum switch tube comprises that the upper end that the lower end of first conducting rod 8 and second conducting rod, 9, the first conducting rods 8 is provided with first contact, 10, the second conducting rods 9 is provided with second contact 20.The are-tight layer 6 of first contact 10 and second contact 20 is oppositely arranged, the magnetic conductive part 5 of first contact 10 and the conductive component 6 of second contact 20 are oppositely arranged, the magnetic conductive part 5 of second contact 20 and the conductive component 6 of first contact 10 are oppositely arranged, and first contact 10 and second contact 20 are by a vacuum body 7 sealings.

First conducting rod 8 is connected with the conductive substrate 2 of first contact 10, and second conducting rod 9 is connected with the conductive substrate 2 of second contact 20, and first conducting rod 8 and second conducting rod 9 stretch out vacuum body 7.

Magnetic conductive part 5 is lower than the conductance of conductive substrate 2, are-tight layer 6 and conductive component 4, and the material of housing 7 is the rigidity material that fusing point is higher than each parts fusing point that is provided with in it, therefore can not melt each parts that protection is inner when sintering earlier.

The direction of arrow is the sense of current among Fig. 1.The action that first contact 10 and second contact 20 disconnect is by controlling first conducting rod 8 or second conducting rod, 9 machineries separate.During disconnection, the contact area of first contact 10 and second contact 20 is more and more littler, up to a contact point is only arranged, contact resistance increases simultaneously, the temperature in zone is increasing, and up to contact point fusing, evaporation and ionization, metallic vapour makes the discharge in the vacuum be maintained, produce vacuum arc, finish two electric disconnections of contact at last.Electric current passes to the conductive substrate 2 of first contact 10 along first conducting rod, flow to are-tight layer 6 along conductive component 4 then, then conducts to the are-tight layer 6 of second contact 20 along metallic vapour, flows away along first conducting rod 9 by conductive component 4 to conductive substrate 2 backs.Electric current conducts to the are-tight layer 6 of second contact 20 along metallic vapour from the are-tight layer 6 of first contact 10, it has cross stream component, promptly produced longitudinal magnetic field, and the magnetic field that magnetic conductive part 5 is produced also has longitudinal component, produce with aforementioned magnetic field stack and to add high-intensity magnetic field and make vacuum arc remain on state stable and diffusion, electric current can comparatively be evenly distributed in two contact surface like this, also can reduce simultaneously the temperature rise of contact surface, avoid a large amount of evaporations of contact material, make arc voltage remain on lower level, reduce the electrical wear of contact.

As can be seen from the above-described embodiment, first contact in the utility model vacuum switch tube both can be identical with the shape of second contact, also can be different, as long as guarantee that two contacts are the spheroid that the side is a convex arc shaped.Simultaneously, the notch shape in the internal structure of first contact and second contact also can choose at random collocation.

First contact among the utility model vacuum switch tube embodiment and second integral body are integrated direct package assembly, do not need to carry out soldering and connect, and change the structure that each isolation of components is provided with in the prior art.The magnetic field intensity of contact is big, and good heat conductivity has high breaking current capacity and long electric life.The longitudinal magnetic field of contact is evenly distributed contact surface, is more suitable for can reaching disjunction more than 40.5 kilovolts in big capacity switch, as the ability of voltages such as 55 kilovolts, 72.5 kilovolts and 110 kilovolts.

It should be noted that at last: above embodiment is only in order to explanation the technical solution of the utility model but not limit it, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement the technical solution of the utility model, and these modifications or be equal to replacement and also can not make amended technical scheme break away from the spirit and scope of technical solutions of the utility model.

Claims

1, a kind of vacuum switch tube, comprise first conducting rod and second conducting rod, described first conducting rod, one end is provided with first contact, described second conducting rod, one end is provided with second contact, it is characterized in that, described first contact and second contact are that the side is the globoid of convex, the outside of described first contact and second contact is laid a housing respectively, described enclosure interior is laid conductive substrate, lay magnetic conductive part on the described conductive substrate, lay are-tight layer on the described magnetic conductive part, described magnetic conductive part from a side to inside, offer the perforation notch from top to bottom, plug conductive component in the described notch, the are-tight layer of described first contact and second contact is oppositely arranged, the conductive component of the magnetic conductive part of described first contact and described second contact is oppositely arranged, and the conductive component of the magnetic conductive part of described second contact and described first contact is oppositely arranged, and described first contact and second contact are sealed by a vacuum body.

2, vacuum switch tube according to claim 1 is characterized in that, described globoid is a spheroid of clipping the two ends spherical crown.

3, vacuum switch tube according to claim 1, it is characterized in that, described first conducting rod is connected with the conductive substrate of described first contact, and described second conducting rod is connected with the conductive substrate of described second contact, and described first conducting rod and second conducting rod stretch out described vacuum body.

4, vacuum switch tube according to claim 1 is characterized in that, described magnetic conductive part is lower than the conductance of conductive substrate, are-tight layer and conductive component, and the material of described housing is the rigidity material that fusing point is higher than each parts fusing point that is provided with in it.

5, vacuum switch tube according to claim 1 is characterized in that, the cross section of described notch is circle or ellipse or triangle or square or rectangular; The cross section of described conductive component is corresponding circle or ellipse or triangle or the square or rectangular in cross section with the notch of described magnetic conductive part.